Magic columns around sent and received emails determine what's "sent" and "received" by the From and To fields in an email. If you're sending and receiving emails through an alias, it's likely that Streak is unaware of that alias and it's distorting your data.
There's a workaround for this, but it's only available if Guest Mode is enabled for your pipeline.
- From the pipeline toolbar, select the Shared or Private button on the right side.
- Click into Advanced.
- If Guest Mode is off, turn it on by clicking enable in the bottom right corner.
- Select the Add button to the right of Guests for just this Pipeline and add your alias an a guest (this is free).
Streak will then recognize emails sent/received from this alias as part of your pipeline's users. Your emails sent from this alias will register as sent/received properly.